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frutty [35]
3 years ago
14

an experiment consists of flipping a fair coin 4 times. What is the probability of obtaining at least one head?

Mathematics
1 answer:
Dvinal [7]3 years ago
7 0
\mathbb P(X\ge1)=1-\mathbb P(X=0)

The probability of getting 0 heads in 4 tosses (or equivalently, 4 tails) is \dfrac1{2^4}=\dfrac1{16}.

So the desired probability is

1-\dfrac1{16}=\dfrac{15}{16}
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inn [45]
We are given with
P(pop quiz) = 60%
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And the condition that
P (pop quiz and do homework) > 5%

So,
P (pop quiz) x P (do homework)
P (pop quiz) x ( 1 - P (not do homework) )
60% x ( 1 - 85%)

The result is greater than five percent so he will not do his homework.
5 0
3 years ago
32. The price of a box of tarts is $1 cheaper than that of a loaf of bread. If 3 times the price of a
Delvig [45]

Answer: $8.60

Step-by-step explanation:

Let the price of a bread = x

Let the price of a tarts = x - 1

If 3 times the price of a loaf of bread is $29.5 more than half of the price of a box of tarts. This can be represented as:

3 × x = 1/2 × (1 - x) + 29.5

3x = 0.5 - 0.5x + 29.5

3x + 0.5x = 29.5 + 0.5

3.5x = 30

x = 30/3.5

x = 8.6

5 0
3 years ago
Samantha is 9 years younger than her brother Maurice. In 10
kozerog [31]

Step-by-step explanation:

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7 0
2 years ago
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True or false.
liubo4ka [24]
Answer - true

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6 0
3 years ago
Walmart has a 24 pack of dr. pepper for $6.88 .Kroger has a 12 pack of dr. pepper for $3.99. Which one is a better buy? show you
Alex
6.88÷24=29 cents per bottle
3.99÷12=33 cents per bottle
the 24 pack is a better deal because each bottle is 29 cents.
4 0
3 years ago
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